package edu.nuc.ahm.juc.add;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

/*
* 抢车位
* 6量车
*  3个车位
* 限流
*
* */
public class SemaphoreTest {
    public static void main(String[] args) {

        Semaphore semaphore = new Semaphore(3);

        for(int i=1;i<=6;i++){
            new Thread(()->{
                // acquire() 得到
                try {
                    semaphore.acquire();
                    System.out.println(Thread.currentThread().getName()+"抢到车位");
                    TimeUnit.SECONDS.sleep(2);
                    System.out.println(Thread.currentThread().getName()+"离开车位");

                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    semaphore.release();
                }

                // 释放 release()
            },String.valueOf(i)).start();
        }
    }
}
